diff --git a/composer.json b/composer.json
index a1f57a5..6c68713 100644
--- a/composer.json
+++ b/composer.json
@@ -30,7 +30,7 @@
     "toolkit/sys-utils": "~2.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "^9.1"
+    "phpunit/phpunit": "^9.1 || ^10.0"
   },
   "autoload": {
     "psr-4": {